KOSMICOS. I will let Darwin answer you, in a passage which I will read. "Whether primeval man," he observes, "when he possessed but few arts, and those of the rudest kind, and when his power of language was extremely imperfect, would have deserved to be called man, must depend on the definition which we employ. In a long series of forms graduating insensibly from some ape-like creature to man as he now exists, it would be impossible to fix on any definite time when the term 'man' ought to be used. But this is a matter of very little importance." That is to say, in the long series of forms descending from the ape-like creature, we can not fix on any one of the modified descendants which we can pronounce to be separated from the family of apes, and to have become the new family, man, because to do this requires a definition of man. Man as he now exists we know, but the primeval man we do not know. He may have been an animal capable of sexual union with some of his kindred who stood nearest to him, but yet remained apes, or he may not. It is not important what he was, or whether we can find the time when he ceased to belong to the family of apes and became the primeval man. The hypothesis of his descent remains good, notwithstanding we can not find that time, because it is supported by a great multitude of facts. SOPHEREUS. I have never seen any facts which I can regard as giving direct support to the theory. But, waiving this want of evidence, doubtless it is not important to find the time, chronologically, when the modified descendants, supposed to have proceeded from the ape-like creature, became the primeval man; but it is of the utmost importance to have some satisfactory grounds for believing that there ever was such an occurrence as the development of the animal man, primeval or modern man, out of such an animal as the ape. And therefore, without reference to the sense in which naturalists use the term "species," I shall give you the sense in which I use it. I use it to designate the animals which are distinct from each other, as the man, the horse, the ape, and the dog are all distinct from each other. Speaking of man as one true species, I include all the races of men. Speaking of the apes as another species, I include all the families of apes. Speaking of the bovine, the equine, or the canine species, I include in each their respective varieties. Now, as crosses in interbreeding can take place between the different varieties or families of these several species, and can not take place between the species themselves--between those which I thus class as species--the limits of such crosses become important facts in considering the theory of evolution, because they narrow the inquiry to the possibility of effecting a propagation of one species out of another species. Take any animal which has become a completed and final product--a peculiar and distinct creature--whether made so by aboriginal creation or produced